What Size Tire Is 285/65R20 In Inches?
The tire size 285/65R20 refers to a tire with a width of 285 millimeters, an aspect ratio (or sidewall height as a percentage of the width) of 65%, and a diameter of 20 inches.
Here are the approximate measurements in inches:
- Diameter of the tire: Approximately 34.6 inches
- Tire width: Approximately 11.2 inches
- Sidewall height: Approximately 7.3 inches (calculated as a percentage of the tire’s width, which is 65% in this case)
- Diameter of the wheel: 20 inches
To calculate the diameter of the tire, we can use the following formula:
- Diameter = (2 x sidewall height x aspect ratio/100) + wheel diameter (in inches)
First, we need to calculate the sidewall height:
- Sidewall height = width x aspect ratio / 100
- Sidewall height = 285 x 65 / 100 = 185.25 mm
We can then convert the sidewall height to inches:
- Sidewall height = 185.25 mm / 25.4 = 7.3 inches
Now we can calculate the diameter of the tire:
- Diameter = (2 x sidewall height x aspect ratio/100) + wheel diameter (in inches)
- Diameter = (2 x 7.3 x 65/100) + 20
- Diameter = 34.6 inches (approximately)
Therefore, the 285/65R20 tire has an overall diameter of approximately 34.6 inches, a tire width of approximately 11.2 inches, a sidewall height of approximately 7.3 inches, and a wheel diameter of 20 inches. Please note that these are approximate measurements, and actual tire sizes can vary slightly depending on the brand and model of the tire.
Tire Height (Diameter) | 34.6 in | 879 mm |
Wheel Size | 20 in | 508 mm |
Sidewall Height | 7.3 in | 185 mm |
Tire Width | 11.2 in | 285 mm |
Tire Circumference | 108.7 in | 2,760 mm |
Revolutions per Mile | 583.1 | |
Revolutions per Kilometer | 362.3 |
What Is A 285/65R20 Tire Equivalent To?
The tire size 285/65R20 is equivalent to several other tire sizes with the same overall diameter, width, and wheel diameter. Here are a few common equivalent tire sizes:
- 275/65R20: This tire has a slightly smaller width than 285/65R20, resulting in a slightly smaller overall diameter. However, the sidewall height and wheel diameter are the same, making it a close equivalent.
- 305/60R20: This tire size has a slightly smaller sidewall height than 285/65R20, resulting in a slightly smaller overall diameter. However, the tire width and wheel diameter are similar, making it a close equivalent.
- 33×11.50R20: This tire size is equivalent in width to 285/65R20. The only difference is the aspect ratio, which is not specified in the 33×11.50R20 tire size. However, it has a slightly smaller overall diameter than 285/65R20 due to the lower aspect ratio.
- 295/60R20: This tire size has a slightly smaller sidewall height than 285/65R20, resulting in a slightly smaller overall diameter. However, the tire width and wheel diameter are similar, making it a close equivalent.
Please note that while these tire sizes are equivalent in terms of overall diameter, width, and wheel diameter, they may have different load capacities and speed ratings. It is important to consult your vehicle’s manual or a tire professional to ensure you use the correct tire size for your specific vehicle and driving needs.
FAQs
What Vehicles Are Compatible With 325/60r20 Tires?
The 325/60R20 tire size is commonly used on large trucks and SUVs, such as the Ford F-150, Chevrolet Silverado, GMC Sierra, and Ram 1500.
What Does The Number 285 In 285/65r20 Mean?
The number 285 in 285/65R20 refers to the tire’s width in millimeters. In this case, the tire has a width of 285mm.
What Does The Number 65 In 285/65r20 Mean?
The number 65 in 285/65R20 refers to the aspect ratio of the tire’s height to width. In this case, the sidewall height is 65% of the tire’s width.
Can I Use 285/65r20 Tires On My Vehicle If It Originally Came With 265/70r17 Tires?
Using a tire size that is significantly different from the one that originally came with your vehicle is not recommended. The 285/65R20 tire has a larger diameter and width than the 265/70R17 tire, which can affect your vehicle’s handling, speedometer reading, and fuel efficiency.
What Is The Load Capacity Of A 325/60r20 Tire?
The load capacity of a tire depends on its specific model and brand. However, most 325/60R20 tires have a load rating of at least 3,195 pounds per tire.
What Is The Speed Rating Of A 285/65r20 Tire?
The speed rating of a tire depends on its specific model and brand. However, most 285/65R20 tires have a speed rating of S, which means they are designed to handle speeds up to 112 mph.
How Often Should I Replace My 325/60r20 Tires?
The lifespan of a tire depends on several factors, such as its quality, usage, and maintenance. However, most experts recommend replacing tires every six years or 50,000 miles, whichever comes first. It is also important to regularly inspect your tires for signs of wear or damage and replace them if necessary.